I just don't see it as an untapped resource. I would venture a guess that the Cubs attendance as it has been since 1984 is made up of a lot of suburbanites who come into the city for games, as well as a huge number of tourists who flock to Wrigley Field. There is no magical untapped suburban market out there; there is a good reason why pretty much every team who has built a new ballpark in the last 25 years has done so in a city center location.

I know a lot of suburbanites that follow the Cubs religiously but only go to 1-2 games a year because they don't want to drive into the city and deal with parking.